JPS61160659A - Stepless speed changer - Google Patents

Abstract

PURPOSE:To decrease a friction loss in a stepless speed changer, by arranging a cone-shaped driving and driven wheel, consisting of magnetic material, placing a large and small contour side in an equal side while between the cone-shaped wheels a transmission wheel, consisting of a magnet, movably in a generator direction of the driving and driven wheel. CONSTITUTION:A stepless speed changer arranges a cone-shaped driving wheel 5, connected with an electric motor 18, and a cone-shaped driven wheel 6, to which power is transmitted through a transmission wheel 15, so that their large and small contour sides are placed in an equal side. While the transmission wheel 15, being interposed between the both wheels 5, 6, is arranged on a threaded bar 7 so that the wheel 15 is movable in the direction of a generator of the both wheels 5, 6 and the wheel 15 serves in accordance with its position to perform action changing speed change ratio. The stepless speed changer, forming the driving wheel 5 and the driven wheel 6 by a magnetic material while the transmission wheel by a magnet, automatically regulates the contact pressure between these wheels to a proper value, enabling a friction loss of the speed changer to be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a continuously variable transmission that can save rotational driving force and be downsized.

``Prior Art'' Conventionally, in a continuously variable transmission, the rotational speed of a cylindrical driven wheel is controlled by pressing the outer peripheral surface of a cylindrical driven wheel against the outer peripheral surface of a conical friction master wheel and moving this driven wheel in its axial direction. There are known devices in which the value can be changed continuously over a certain range.

``Problems to be Solved by the Invention'' However, in such conventional continuously variable transmissions, surface pressure is applied to the outer periphery of the conical friction master wheel and the cylindrical follower wheel.
Therefore, side pressure is applied to the bearings of the master vehicle and the driven vehicle, resulting in large friction loss, which requires extra rotational driving force from the rotational drive source.As a result, the rotational drive source becomes larger, and as a result, The disadvantage was that the entire continuously variable transmission was large.

An object of the present invention is to provide a continuously variable transmission that eliminates the above-mentioned drawbacks of conventional continuously variable transmissions.

"Means for Solving the Problems" In order to achieve the object, the present invention has the following configuration. That is, at least the outer circumference is made of a magnetic material, and the cone-shaped original wheels are rotatably arranged side by side in a housing, with the large diameter side and the small diameter side located on the same side, and each outer circumferential surface parallel to each other and spaced apart by a predetermined distance. It reciprocates in the length direction of the outer circumferential surfaces of the master vehicle and the slave vehicle, which are circumscribed by their own adsorption force on both sides between the master vehicle and the slave vehicle, and are parallel to the master vehicle and the slave vehicle. It includes a ball made of a magnet that is movable back and forth by a moving mechanism and transmits the rotational force of the master vehicle to the driven vehicle, and a rotational drive source connected to the master vehicle.

"Operation" When the ball is moved in the length direction of the outer circumferential surfaces of the cone-shaped master wheel and the follower wheel, which are opposed in parallel, the outer diameter of the master wheel and the outer diameter of the follower wheel at the contact point are Since the ratio changes, the rotation speed of the driven vehicle changes continuously. Note that the balls made of magnets are not pressed against the master car and follower car by other pushing forces, but are attracted to them by their own attractive force and transmit the rotation of the master car to the follower car, so that the master car and follower car are The rotational transmission between the two is extremely smooth, and therefore the friction loss in the rotational force transmission is extremely small.

"Example" An example of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 in FIG. 1 is a housing, and in this housing 1, a master shaft 2 and a slave shaft 3 are rotatably provided in parallel with a predetermined distance apart through a bearing 4. One end of the slave shaft 3 protrudes from the housing l and serves as an output portion 3a.

A master wheel 5 made of a cone-shaped magnetic material is fixed coaxially to the master shaft 2, and a follower wheel 6 made of a cone-shaped magnetic material is fixed coaxially to the slave shaft 3. It is being The master vehicle 5 and the slave vehicle 6 are formed to have the same shape and size, and the large diameter side of the master vehicle 5 and the small diameter side of the subsidiary vehicle 6 are the same, and the small diameter side of the master vehicle 5 and the large diameter side of the subsidiary vehicle 6 are the same. It is located on the side.

Further, the facing surfaces of the outer periphery of the original vehicle 5 and the outer periphery of the follower vehicle 6 are parallel to each other.

A threaded rod 7 is disposed in the center between the parallel opposing surfaces of the outer periphery of the master vehicle 5 and the outer periphery of the driven vehicle 6, and this threaded rod 7 is immovable in its axial direction but rotatable. It is attached to the side walls 1a, lb of the housing l. 8 is a flange,
9 is a snap ring, and 10 is a groove for turning the threaded rod 7 with a screwdriver.

An H-shaped guide member 14 formed by flanges 11 and 12 connected by a connecting portion 13 is screwed onto the threaded rod 7 at its center. The side surfaces of the flanges 11 and 12 on the original car 5 and the slave car 6 are arcuate surfaces along the maximum diameters of the original car 5 and the slave car 6, as shown in FIG.

On both sides between the original vehicle 5 and the slave vehicle 6, a pair of balls 15 and 16 of the same size made of magnets are disposed on both sides of the connecting portion 13 and between the flanges 11 and 12. these balls 1
5.16 are circumscribed by the master vehicle 5 and the slave vehicle 6 due to the adsorption force of these balls 15.16 themselves. Note that the threaded rod 7 attached to the housing 1 and the guide member 14 constitute a reciprocating mechanism. In addition, the housing l has a holder 1.
A motor (rotary drive source) 18 is fixedly attached via 7. The rotating shaft of this motor 18 is connected to the original shaft 2.

When the motor 18 is operated, the original wheel 5 rotates, and as the original wheel 5 rotates, the balls 15.16 rotate, and the follower wheel 6 rotates via the balls 15.16. At this time, a force is applied to the balls on the side where the outer circumferential surfaces of the master vehicle 5 and the slave vehicle 6 move toward the intermediate portion of the master vehicle 5 and the slave vehicle 6, so that the balls enter the intermediate portion, and the balls are attracted. Together with the force, the rotation of the original vehicle 5 is surely transmitted to the follower vehicle 6.

Also, fit the screwdriver (tool) into the groove lO and screw the threaded rod 7.
When the guide member 14 is rotated left and right, the guide member 14 reciprocates in the axial direction of the threaded rod 7. Ball i5.1 in the axial direction of the threaded rod 7
6, the ratio of the outer diameter of the original vehicle 5 and the outer diameter of the slave vehicle 6 at the contact point of the balls 15 and 16 changes.
The rotational speed (and thus the rotational speed of the slave shaft 3) changes continuously.

Note that the balls 15 and 16 made of magnets are not pressed against the master car 5 and the follower car 6 by other pressing force, but are attracted to these by their own attractive force and transmit the rotation of the master car 5 to the follower car 6. Therefore, the rotational transmission between the master vehicle 5 and the slave vehicle 6 is extremely smooth, and therefore the friction loss in the rotational force transmission is extremely small, so the rotational driving force is correspondingly small, and a small rotational driving source can be used. As a result, a compact continuously variable transmission can be provided.

"Effects of the Invention J: Balls made of magnets are attracted to the master car and the slave car by their attractive force and transmit the rotation of the master car to the follower car, so the rotation transmission between the master car and the follower car is extremely smooth. Friction loss in rotational power transmission is extremely small, and the rotational driving force is correspondingly small. Therefore, it is possible to use a rotational drive source with a smaller rotational driving force than before, making it possible to downsize it, and by extension, continuously variable speed. The machine as a whole can be made smaller, and the range of use for various devices is extremely wide.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II--I in FIG. 1. 1...Housing, 2...Original axis, 3.
...Slave shaft, 5...Original vehicle, 6...
Follower vehicle, 7... Threaded rod, 14... Guide member, 1
5.16...Ball, 18...Mori (rotational drive source).

Claims (1)

[Claims] A cone-shaped master car and a follower car whose at least the outer periphery is made of a magnetic material, and which are rotatably arranged side by side in a housing with the large diameter side and the small diameter side located on the same side, and each outer peripheral surface parallel to each other and spaced apart by a predetermined distance. and a reciprocating mechanism that circumscribes the outer peripheral surfaces of these original cars and driven cars on both sides between these original cars and driven cars and moves in the length direction of the outer peripheral surfaces that are parallel to the original cars and driven cars. A continuously variable transmission comprising: a ball made of a magnet that is reciprocally movable and transmits the rotational force of the master vehicle to a driven vehicle; and a rotational drive source connected to the master vehicle.